Class InCondition

java.lang.Object

org.tentackle.dbms.dsl.InCondition

All Implemented Interfaces:

Condition, SqlElement

public class InCondition
extends Object
implements Condition

An expression tested to be one of a set of values or sub-select rows.

An empty set of values is rendered as a condition that is never true (always true if negated), which is what applications expect when they build the value set dynamically.

Author:

harald

Constructor Summary

Constructors

Constructor	Description
InCondition(Expression<?> expression, Collection<? extends Expression<?>> values, boolean negated)	Creates a condition testing an expression against a set of values.
InCondition(Expression<?> expression, Select select, boolean negated)	Creates a condition testing an expression against the rows of a sub-select.

Method Summary

Modifier and Type	Method	Description
Expression<?>	getExpression()	Gets the tested expression.
Select	getSelect()	Gets the sub-select.
List<Expression<?>>	getValues()	Gets the values.
boolean	isNegated()	Returns whether the expression is tested not to be one of the values.
void	render(RenderContext context)	Renders this element into the given context.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface Condition

and, not, or

Constructor Details

InCondition

public InCondition(Expression<?> expression,
 Collection<? extends Expression<?>> values,
 boolean negated)

Creates a condition testing an expression against a set of values.

Parameters:

expression - the tested expression

values - the values, may be empty

negated - true for NOT IN, false for IN

InCondition

public InCondition(Expression<?> expression,
 Select select,
 boolean negated)

Creates a condition testing an expression against the rows of a sub-select.

Parameters:

expression - the tested expression

select - the sub-select returning a single column

negated - true for NOT IN, false for IN

Method Details

getExpression

public Expression<?> getExpression()

Gets the tested expression.

Returns:

the expression

getValues

public List<Expression<?>> getValues()

Gets the values.

Returns:

the unmodifiable list of values, null if this condition refers to a sub-select

getSelect

public Select getSelect()

Gets the sub-select.

Returns:

the sub-select, null if this condition refers to a list of values

isNegated

public boolean isNegated()

Returns whether the expression is tested not to be one of the values.

Returns:

true for NOT IN, false for IN

render

public void render(RenderContext context)

Description copied from interface: SqlElement

Renders this element into the given context.

Specified by:

render in interface SqlElement

Parameters:

context - the render context